Signal transmitter



July 27, 1943.

F. H. OSBORNE SIGNAL TRANSMITTER Filed Sept. 4, 1941 M L l. 25

I /gz 75 I H 77 75 38 .7

INVENTOR. fi. OJBbK/Vfi BY 7 r Patented July 27-, 1943 SIGNALTRANSMITTER Fred H. Osborne, Snyder, N. Y., asslgnor to The RudolphWurlitzer Company, Cincinnati, Ohio, a corporation Application September4, 1941, Serial No. 409,493

8 Claims. (Cl. 194-9 This invention relates to a signal transmitterwhich is particularly adapted for remote control of automatic recordchanging phonographs but which is useful for other purposes as well.Certain features of the invention are applicable to local coin controlas wellas remote control.

The invention is particularly adapted to a cyclic type of signaltransmitter operable through successive operating cycles in each ofwhich a controlling signal may be generated. Preferably each signalconsists of a series of electrical impulses, and selectivity is obtainedby controlling the number of impulses in each series. The impulses maybe of a direct current type transmitted over metallic circuits, may betransmitted by radio or metallic circuits in the form of power impulsesimpressed upon a suitable carrier wave or may be transmitted in othersuitable forms. In the preferred form of the invention a power modulatedcarrier wavetransmitted over commercial power lines is used and certainfeatures of the invention are particularly applicable to this type oftransmission, while other features are of more general application.

One object of the present invention is to provide a remote controltransmitter particularly adapted for coin control of a machine such as arecord changing phonograph and which is adapted to operate in responseto coins of several difierent denominations. In co-pending applicationof La Mar H. Hayslett and Fred H. Osborne, Serial No. 405,522, filedAugust 5, 1941, there is described and claimed a remote control systemoperable in response to coins of a single denomination. In the controlapparatus of said co-pending application a single series of signalimpulses may be transmitted upon receipt of a single coin of a definitevalue.

Another object of the present invention is to provide a transmitterwhich may operate with the signal receiving apparatus described in saidco-pending application and in which one or more series of selectivesignals may be transmitted upon receipt of coins of differentdenominations, the number of said series depending upon the denominationof the coin received.

Another object of the invention is generally to improve signal impulsetransmitters of the type described and to provide accurate, complete andcertain operation thereof.

Other objects and features of the invention will be understood from theaccompanying drawing and the following description and claims:

The drawing is a-diagram of electrical connections of a transmitterconstructed in accordance with the preferred form of the invention withmechanical parts illustrated diagrammatically.

The apparatus disclosed in the drawing may be divided for convenience ofdescription into two divisions, the cycle control apparatus and thesignal generating apparatus. The cycle control apparatus will first bedescribed.

Cycle control apparatus Referring now to the drawing, there is showntherein a socket plug H! which may be inserted in an outlet socket of alocal wiring system providing preferably the usual 60 cycle alternatingcurrent. A pair of power lines It and I2 are connected to the prongs ofthe plug Ill and one of said power lines may include the usual cutoutswitch l3 and the other may include an overload fuse L4 or othersuitable overload protection. The power lines H and i2 provide thenecessary power for operation of anelectric motor IS, a number ofelectromagnetic relays l6, l1, l8 and l9, a register magnet 20, a latchmagnet 2| and a transformer 22. The transformer 22 has its primarywinding connected to the power lines H and I2 and its secondary windingsupply current at a suitable potential for operation of. the signalgenerating apparatus to be hereinafter described.

The motor I5 is mechanically connected to drive a pair of contact discs23 and 24, a pair of multl-polnt rotary switches 25 and 26 and amulti-point switch 21, a cam 28 operating a switch 29, a cam 30operating a switch 3i and a cam 32 operating certain mechanical parts.The switches 21, 29 and 3| may be considered as part of the signalgenerating apparatus. The mechanical connection of the motor to thevarious driven elements just mentioned is indicated in the drawing bybroken lines 33 and it is to be understood that these connections aresuch that each of the driven elements makes one complete revolution in agiven period of time. In the drawing each of these driven elements isshown in an initial idle position and in each cycle of signal operationeach of said driven elements makes one complete revolution and returnsto said idle positlon.

The relay l6 may be named for convenience the twenty-five-cent relay"and is adapted when energized to close a series of normally openswitches 34, 35, 36 and 31. The relay I1 may be called the ten-centrelay" and is adapted when energized to close a series of normally openswitches 38, 39, 40 and ll. The relay l8 may be called the "push buttonrelay and when energized closes a pair of normally open switches 42 and43. The relay i9 is known as the isolation relay" and when energizedcloses a normally open switch 44 and opens a normally closed switch 45.The register magnet 20 forms part of a coin register device of a wellknown type consisting of a ratchet wheel 46 urged in a counterclockwisedirection by a torsion spring 41 and normally held in an initial idleposition by an escapement 48 operated by the magnet 20. In the normalidle position a pin 49 on said ratchet engages one member of a switch 56and holds said switch in the open position. The motor operated cam 32engages a lever arm which is mounted at 52 on a stationary pivot andwhich has secured to the outer end thereof a link 53 having a hookedupper end adapted to engage the teeth of the ratchet 46 and to move saidratchet in opposition to the action of the spring 41. In the operationof the coin register device just described, each actuation of theregister magnet 20 operates the escapement 48 to permit the ratchetwheel 46 to move counterclockwise a distance corresponding to one tooth.In the first such movement the switch 50 is closed and it is not againopened until the cam 32 has operated the link 53 to return the ratchet46 to initial position. In order to return to initial position thenumber of operations of link 53 must equal the number of previousactuations of magnet 20.

For selective control of signal transmission there are provided a numberof push buttons 54, four of which are shown in the drawing. It is to beunderstood that as many such push buttons may be provided as desired.Each of said buttons when pressed opens a normally closed switch 55,closes a normally open switch 56 and opens a normally closed switch 51,the last named switch being associated with the signal generator. Theswitches 55 for the several push buttons are connected in series. Theswitches 51 are similarly connected and the switches 56 are connected inparallel, The last of the push buttons 54 is not provided with a switch51.

Each of the push buttons 54 is provided with a latch mechanism, one ofwhich is shown in the drawing by way of illustration. It is understoodthat the others are similar and that other suitable forms of latchdevices may be employed. Said latch mechanism includes a collar 58secured to the stem of the push button 54. A compression spring 59abutting against the collar 58 and against a stationary member 60 urgesthe push button 54 toward the normal idle position. A latch member 6|mounted on a stationary pivot 62 is urged toward engagement with thecollar 58 by a tension spring 63. A latch bar 64 having a projection 65engaging the latch member 6| is normally drawn to the left by a tensionspring 66 but is drawn to the right against the action of said springwhen the latch magnet 2| is energized. In the idle condition of theapparatus the latch bar 64 normally holds the latch member 6| in suchposition that it cannot engage the collar 58. If one of the push buttons54 is pressed under this condition, it immediately returns to normalposition as soon as the operator's finger is removed. When the latchmagnet 2| is energized, the latch bar 64 is drawn to the right andreleases the latch member 6|. If one of the push buttons 54 is pressedunder this condition, the latch member 6| engages the collar 58 andholds the push button in its lowermost position until the latch magnet2| is deenergized.

The transmitter may be provided with a suitable coin receiver of anywell known type adapted to receive coins of different denominations. Thecoins may be received in separate slots for each denomination or may bereceived in a single slot and sorted. In either case, each denominationof coin is caused to operate an electric switch, separate switches beingprovidedfor each denomination. In the drawing the switches justmentioned are illustrated in the form of the usual butterfly switchesI4, 15 and 16, each of which is momentarily closed upon receipt of acoin of a given denomination. It may be assumed that the switch I4 isclosed by a twenty-five-cent piece, the switch 15 by a ten-cent pieceand the switch 16 by a five-cent piece.

The wiring circuits for the cycle control apparatus may best bedescribed in connection with a description of the operation of theapparatus.

Wiring and operationCycle control apparatus In operation the severalelements of the apparatus initially stand in the condition shown in thedrawing. None of the relays or magnets are energized and the push buttonlatches 6| are held out of engaging position by the latch bar 64. Thepush buttons therefore cannot be latched in the selected position. Inthe normal operation the coin is deposited first and a selected pushbutton is then operated.

Assuming that a five-cent piece is deposited, the switch 16 ismomentarily closed and completes a circuit for the register magnet 20direct from power line H. The actuation of said magnet operates theratchet wheel 46 to close switch 50 as previously described. All of thepush buttons-54 being in normal position and all of the switches 55being closed, the operation of switch 50 completes a circuit for thepush button relay I8, said circuit leading from the power line H througha contact finger 11, contact disc 23, a contact finger 18, all of theswitches 55, the relay 8 and switch 56 to the power line i2. Theoperation of the push button relay i8 closes switch 42, short circuitsthe switches 55 and maintains the circuit just described after one ofthe push buttons 54 has later been pressed. The operation of relay l8also closes switch 43. Thereafter one of the push buttons 54 may bepressed, and the corresponding switch 56 is closed. The operation of anyone of the switches 56 completes a circuit for the motor l5 from thepower line H through switch 43, the selected switch 56 and the motorwindings to power line l2. It is to be noted that said circuit could notbe completed prior to the operation of the relay l8 since switch 43 thenstood open. At the same time, a circuit is completed for the latchmagnetZi since said magnet is connected in parallel with the windings ofthe motor IS. The operation of said magnet releases the latch members 6|and the selected push button 54 is therefore retained in the selectedposition.

The first operation of the motor l5 rotates the contact disc 24 andengages said disc with a contact finger i9 theretofore registering witha recess in said disc. Aretaining circuit is thus completed for themotor from the power line H, through finger I9, disc 24 and a contactfinger 8| to said motor. This retaining circuit is not broken until themotor and the elements driven thereby have completed a cycle ofoperation to return the recess 86 to the finger I9. Thus a completecycle of motor operation is assured independent of the later opening ofthe circuit by means of which the motor was started.

At a convenient time in the cycle of operation, a recess 82 in thecontact disc 23 engages the finger 11 and breaks the circuit for thepush button relay Ill. The switch 42 .15 thus opened and since one ofthe switches 55 is open, the relay I8 is not again energized when therecess 82 passes the contact finger 11 and said finger reengages thecontact disc 23. Thereafter, the checkofi cam 32 is operated to returnthe ratchet 46 to normal position and open the switch 50. When acomplete cycle of motor operation has been accomplished. the recess 80engages the finger 19 and breaks both the motor circuit and the circuitof the latch magnet 2| to stop the motor and return the selected pushbutton to normal position.

When a ten-cent piece is deposited, the switch 15 is momentarily closed.Said switch completes a circuit for the ten-cent relay 1. Actuation ofsaid relay closes the switch 38 and completes a retaining or stickcircuit for the relay from the power line H through finger 11, disc 23,finger 18 and switch 38. Thus the relay I1 is energized by momentaryactuation of switch 15 and remains energized until the retaining circuitis broken. The operation of the ten-cent relay |1 closes switch 48 tocomplete a circuit for the motor I direct from the power line H and thusstarts motor operation independently of the push button switches 56 andthe switch 50 of the coin register device. At the same time the latchmagnet 2| is actuated as before to place the latch members 6| incondition for operation. The relay |1 also closes switch 4| to completea circuit for the isolation relay I9 direct from the power line H. Theactuation of said relay closes switch 44 and opens switch 45. Switch 44is a stick contact which connects the relay IS in parallel with themotor 5 and said relay therefore remains energized as long as the motorcontinues to operate even though switch 4| is later opened. Relay l1also closes switch 39 to condition a circuit for operation by themulti-point switch 25.

The operation of motor |5 in response to the actuation of the ten-centrelay |1 first turns the contact disc 24 to close the motor retainingcircuit as before. Thereafter and before the recess 82 in disc 23reaches finger 11, the multipoint switch 25 is rotated and makesmomentary contact at each of three contact points 83. Each of said threecontacts energizes the register magnet 26 through a circuit leading fromthe power line H through switches 25 and 39 to said magnet. The ratchetwheel 46 of the coin register device is thus operated through a distancecorresponding to three teeth and the switch 58 is closed. Assuming thatnone of the push buttons 54 have been pressed, the closing of switch 50operates the push button relay |8 a before. However, immediately afteroperation of the switch 25 the recess 82 in contact disc 23 reaches thefinger 11 and breaks the circuit for relay I8 and the retaining circuitfor relay |1. Thereafter the check-off cam 32 operates the ratchet wheel46 to return the same in the clockwise direction a. distancecorresponding to one tooth, thus leaving two unit coin values registeredon the coin register device. At the completion of the cycle of motoroperation, the motor is stopped when recess 80 in the contact disc 14reaches finger 18. At the same time the latch magnet 2| is deenergizedto release any push button which may have been pressed and the isolationrelay I8 is deenergized. The parts have thus returned to their normalidle position except that the switch 50 is closed and two unit coinvalues have been registered on the coin registry device.

Thereafter the operation of any oneof the push buttons 54 results in asecond cycle of operation exactly similar to that produced by anoperation of one of the-push buttons after the receipt of a five-centpiece. During this cycle of operation, the check-oft cam 32 checks ofione of the coin value on the register device, leaving switch 50 stillclosed and one coin value still registered. B operation of another ofthe push buttons 54, anotidier similar cycle of motor operation isproduce The deposit of the ten-cent piece thus results first in apreliminary cycle of motor operation independent of the push buttons 54and during this operation the isolation relay I9 is energized and switch45 is opened. -Switch 45 is included in one of the controlling circuitsof the signal generating apparatus which will he described in moredetail hereinafter and when opened it renders said generating apparatusineffective. The preliminary cycle of motor operation is thusineffective to transmit a signal and the positions of the push buttons54 during the cycle is immaterial. The preliminary cycle results inthree actuations of register magnet 20 and the subsequent check-off ofone of the coin values so registered. The apparatus is thus left incondition for two subsequent signal cycles which may be initiated bysuccessive actuations of two of the push buttons 54 and during each ofwhich controlling signals may be generated and transmitted.

The deposit of a twenty-five-cent piece results in an initial cycle ofoperation similar to that described for the ten-cent piece, thetwenty-fivecent relay l6 and its associated switches 34, 35, 36 and 31performin the same functions as the ten-cent relay l1 and its associatedswitches 38, 39, 40 and 4|. The switch 35 however connects the registermagnet 20 to the multi-point switch 26 which is provided with 6 contactpoints 84 instead of the three contact points carried by switch 25. Thusthe coin register device receives six actuations, one of which ischecked oh by the operation of cam '32 during the preliminary cycle.During this cycle the isolation relay i9 is energized as before toprevent generation or transmission of signals and at the end of saidcycle the apparatus is left in condition for five successive actuationsby push button control.

Signal generating apparatus The signal generating apparatus is disclosedherein as similar in principle to that shown in the co-pendingapplication of Hayslett and Osborne, previously mentioned. Othersuitable types of cyclic signal generators may be used as well. Saidgenerator includes electron discharge tubes 81, 88 and-89. Tube 81 isshown as a standard pentode tube and is used as a generator of radiofrequency energy. Tube 88 is a twin triode tube. One of the triodeelements is used as a radio frequency amplifier and modulator and theother as an audio frequency oscillator. Obiously, two standard triodetubes could be used in place of the single tube 88. Tube 89 is shown asa diode tube connected as a half-wave rectifier to supply the necessaryD. 0. plate voltages for tubes 81 and 88. In practice it is advantageousto combine the elements of tubes 81 and 89 in a single tube but separatetube are illustrated in the drawing for the sake of simplicity.

One terminal of the secondary winding of transformer 22 is grounded andthe opposite terminal is connected to the anode 99 of the rectifier tube89. The cathode 9I of said tube is connected to a distributory conductor92 which is maintained thereby at a suitable potential above ground andsupplies the necessary D. C. potential for the plate circuits of tubes81 and 88. A condenser 93 connected between conductor 92 and groundserves to smooth out the D. C. voltages. The cathodes of the severaltubes may be heated by heating elements connected to suitable taps onthe primary or secondary windings of transformer 22 in a conventionalmanner.

Wiring. and operation signal generating apparatus At the beginning ofeach cycle of motor operation, the motor moves cam 29 to close switch 29and said switch remains closed throughout the cycle of operation. Switch29 is connected in series with switch 45 and except when switch 45 isopened, the switch 29 starts the operation of the radio frequencyoscillator tube 81. Said tube is provided with a conventionalanodecathode circuit leading from the D. C. distributory conductor 92through inductance 94 and tuning condenser 95 in parallel to the anode96 and thence through'the cathode 91, switch 29 and switch 45 to ground.The grid-cathode circuit leads from cathode 91 to control grid 98through a resistor 99 and the parallel path formed by inductance I99 andcondenser I9I. Inductances 94 and I99 are coupled to give the necessaryfeed back for oscillation and the frequency of oscillation is controlledby the tuning of condenser 95. Preferably oscillations of the order of250 kc. are used. Since switches 29 and 45 are included in theanode-cathode circuit, radio frequency energy is generated in thecircuits of said tube only when both switches are closed. The tube thusoperates during operation of the motor I except on the preliminaryoperating cycles for the coins of multiple unit value.

The. radio frequency energygenerated in the tube 81 is amplified andpower modulated by the tube 88 and associated circuits. In tube 88 theaudio oscillator section consists of cathode I92, control grid I93 andanode I94. The radio frequency section of the tube consists of cathodeI95, grid I95 and anode I91. The two cathodes I92 and I95 are connectedtogether and are connected to ground through the lower half of avariable inductance I98 which is thus common to the cathode circuits ofboth sections of the tube. A condenser I99 serves as a radio frequencybypass for the cathodes. The control grid I93 is connected to thecathodes through a resistor H9 and to the inductance I98 through aresistor III, the switch 3|, switch 21 and certain of the switches 51,depending upon the position of the finger II2 of switch 21. A condenserH3 is shunted across the inductance I98 to complete the audio frequencytuned circuit. The anode I94 is directly connected to the D. C.distributory conductor 92. The grid I95 is coupled to the grid of tube81 through a condenser H4 and a resistor I I5. An inductance II5 servesas a radio frequency choke between grid I96 and the cathode circuits.Anode I91 is connected to the D. C. distributory conductor 92 throughcondenser III, variable condenser H9 and inductance II9, all connectedin parallel and together forming a radio frequency tank." W

In the electrical connections just described, the

inductance I98 and condenser I I8 form the tuned circuit of the audiofrequency section of the tube 88. The grid I98 receives the necessaryenergy for oscillation from the tuned-circuit only when switch 3| isclosed and a circuit is complete from said switch through switch 21 andone or more of the push button switches 51 to the inductance I98. Theinductance I98 also forms a part of the cathode circuit of the radiofrequency section of the tube 88 so that the potential of the cathodeI95 is affected by the oscillating current in the inductance I99. Thusthe inductance I98 serves the dual purpose of producing oscillation andcontrolling the potential of the cathode I95 to modulate the radiofrequency energy.

During each cycle of motor operation, the cam 39 and switch 21 arerotated through a complete revolution. The cam 39 is provided with aprojecting portion I29 adapted to engage and close the switch 3| for anappreciable period of time at the start of motor operation. Thereaftersaid switch is engaged by a series of teeth I2I to produce a successionof much briefer momentary actuations of said switch. The operation ofswitch 3!, so long as the circuit is complete through switch 21 and thepush button switches 51, results in modulation of the radio frequencyenergy in the form of a single relatively long power impulse followed bya succession of much shorter impulses. 1

The switch 21 is provided with a contact segment I22 connected to theswitch 3| and to the first of the switches 51. The switch 21 also has aseries of contact points I23 connected with the switches 51 as indicatedin the drawing. In the operation of the motor I5 the switch 21 is movedin timed relation with the operation of the impulse switch 3I and thisrelation is such that the finger II2 engages the contact segment I22during the long impulse and the first of the shorter impulses producedby switch 3|. The second of the shorter impulses occurs when the fingerII2 Y is in contact with the first of the contact points- I23.Similarly, successive impulses occur while the finger H2 is inengagement with successive contact points I23. The contact finger I I2is constantly in engagement with a contact ring I24 connected to theinductance I98 and condenser I I3. Thus the modulating circuit is alwayscomplete during the long impulse and the first of the shorter impulses.Thereafter the movement of the finger II2 introduces the switches 51successively into the modulating circuit. When aswitch 51 which haspreviously been opened by operation of its associated push button 54 isintroduced into the circuit, said circuit is broken and no further powerimpulses can be produced even though switch 3I continues to operate. Forexample, if the first of the switches 51 has been selected, the circuitis broken when the finger I I2 moves to the first of the contact pointsI23. The

impulses and a single shorter one.

generated signal then consists only of the long If the first of theswitches 51 is in normal position and the second of said switches hasbeen opened, a second short impulse is added to the signal. Thus thenumber of short impulses in a given series is determined by theoperation of the proper push button 54.

Radio frequency energy from the tube 81 is fed to the grid I96 throughthe condenser I I4 and resistor H5 and is amplified, modulated andimpressed upon the tank circuit II1-I I8--I I9 by the radio section ofthe tube 88. The inductance H9 is coupled with an inductance I25connected with an inductance I28 and loosely coupled with inductance I29and said coupling induces corresponding high frequency energy therein.One

terminal of each of the inductances I28 and I29 is connected to thepower line I I- and the opposite terminals of said inductances may beselectively connected to the power line I2 by a switch I30 connected tothe last mentioned power line through a condenser I3I.

By means of the connections just described, the

. amplified and modulated radio frequency output of tube 88 is impressedupon the power lines II and I2 by either one of the inductances I28 andI29, the particular one of said inductances to be used being chosen bymanual operation of the switch I30 and the choice depending upon thestrength of signal required to be impressed upon said power lines.. Thesignal so impressed upon the power lines may be transmitted thereby to a3. In a signal transmitter having a cyclic sigunalgenerator, thesub-combination of a motor operating said generator, an impulse operatedregister device and associated circuits controlling operation of saidmotor and-normally limiting the number of cycles of motor operation tothe number oi impulses registered thereby, check-on means operated bysaid motor during each operating'cycle to check 011 a registration fromsaid register device, a pair of coin controlled electric switches eachoperablelby a, coin of, a diflferent denomination, a circuit; associatedwith the switch receiver such as that described in the before-mentionedco-pending application of Hayslett and Osborne and may be used tooperate said receiver in the same manner as described in said copendingapplication.

The invention has been described in one of its preferred forms, thedetails of which may be varied by those skilled in the art without de-'parting from the scope of the invention as defined by the appendedclaims.

The invention claimed is:

I. In a signal transmitter having a cyclic signal generator, thesub-combination of a motor operating said generator, an impulse operatedregister device and associated circuits controlling operation of saidmotor and normally limiting the number of cycles of motor operation tothe number of impulses registered thereby, checkofthesmaller'denomination coin and adapted to operate said register devicein response to receipt of a coin, a parallelcircuit for said registerdevice controlled by-the switch of the larger denomination coin andincluding impulse switching means operated by said motor to register aplurality of impulses thereon during a cycleoi operation, and circuitscontrolled by operation of the switch of the largerdenomination of coinand adapted to initiate a cycle of motor operation for registering saidplurality of impulses.

4. In a remote control signal transmitter having a cyclic signalgeneratonadaptedto generate a control signal during each operatingcycle, .the sub-combination of a motor operating said generator, animpulse operated register device adapted to register electrical impulsesreceived there by, check-off mechanism operated by said motor andadapted to check off one impulse registration from said register deviceat each cycle of operation, a coin controlled electrical circuitresponsive to receipt or a coin of a given denomination to operate saidregister device to register one impulse thereon, a parallel circuitforsaid register device including impulse switching means operated bysaid motor to register a plurality of impulses during a cycle ofoperation, said circuit being normally inactive, and coin controlledmeans responsive to a coin of a larger denomination and adapted tocondition said oil means operated by said motor during each I operatingcycle to check off a registration from said register device, a manuallycontrolled elec tric switch and associated circuits adapted to initiatea cycle of operation of said motor, and an electric circuit adapted tooperate said register device, said circuit including impulse switchingmeans operated by said motor to register a predetermined number ofimpulses on said register device during the cycle of operation soinitiated.

2. In a signal transmitter having a cyclic signal generator, thesub-combination of a motor operating said generator, an impulse operatedregister device and associated circuits controlling operation of saidmotor and normally limiting the number of cycles of motor operation tothe number of impulses registered thereby, check-off means operated bysaid motor during each operating cycle to check ofi a registration fromsaid register device, a pair of coin controlled electric switches eachoperable by a coin of a different denomination, circuits associated withsaid switches and adapted to initiate a cycle of operation of said motorin response to the receipt of a coin, and parallel circuits adapted tooperate said register device, each of said circuits being controlled byoperation of one of said coin controlled switches, and each includingimpulse switching means operated by said motor to register apredetermined number of impulses on said register device commensuratewith the denomination of the corresponding coin.

parallel circuit for operation and to initiate a cycle of operation ofsaid motor. 5. In a remote control signal transmitter hav-- ing a cyclicsignal generator adapted to generate Y a control signal during eachoperating cycle, the sub-combination of a motor operating saidgenerator, an impulse operated register device adapted to registerelectrical impulses received thereby, check-off mechanism operated bysaid motor'and adapted to check off one impulse registration from saidregister device at each cycle ofoperation, a coin controlled electricalcircuit responsive to receipt of a coin of a given denomination tooperate said register device to register one impulse thereon, a parallelcircuit for said register device including impulse switching meansoperated by said motor to register a plurality of impulses during acycle of operation, said circuit being normally inactive, and'coincontrolled means responsive to a coin of larger denomination and adaptedto condition said parallel cir-.

cuit for operation, to initiate a preliminary cycle of motor operationduring which saidplurality of impulses are registered and toirender saidsignal generator inactive during said preliminary cycle.

6. In a remote control signal transmitter having a cyclic signalgenerator adapted to generate a control signal during each operatingcycle, the sub-combination of a motor operating said generator, animpulse operated register device adapted to register electrical impulsesreceived thereby, check-off mechanism operated by said motor and adaptedto check oil one impulse registration from said register device at eachcycle of operation, a coin controlled electrical circuit responsive toreceipt of a coin of a given denomination to operate said registerdevice to register one impulse thereon, a parallel circuit for saidregister device including impulse switching means operated by said motorto register a plurality of impulses during a cycle of operation, saidcircuit being normally inactive, a coin actuated stick relay responsiveto a coin of a larger denomination, circuits controlled by said stickrelay and adapted to condition said parallel circuit ior operation, toinitiate a preliminary cycle of operation of said motor during whichsaid plurality of impulses areregistered and to render said signalgenerator inactive, and switching means operated by said motor aftersaid impulses are registered and serving to release said stick relay.

7. In a signal transmitter the combination of a cyclic signal generator,a plurality of manually operable selector means adapted to control thecharacteristics of the signals transmitted, a motor operating saidgenerator, electric circuits associated with said selector means andadapted to initiate a cycle of motor operation when any one of saidselector means has been placed in a selected position, latching meansadapted to hold said selector means in selected position, andelectromagnetically operated latch restraining means operated in timedrelation with the operation of said motor to render said latching meanseifective during periods of motor operation and inffective at othertimes.

8. In a signal transmitter the combination of a cyclic signal generator,a plurality of manually operable selector means adapted to control thecharacteristics of the signals transmitted, a motor operating saidgenerator, a stick relay control switch, an operating circuit for saidrelay controlled by said control switch said selector means andoperating said relay when said control switch is closed and all of saidselector means are in normal position, a motor operating circuitassociated with said relay and said selector means and adapted toinitiate a cycle of motor operation when said relay has been operatedand one of said selector means has been placed in selected position,latching means adapted to retain said selector means in selectedposition, and means operated in timed relation to the operation of saidmotor first to release said stick relay and then to release saidlatching means.

FRED H. OSBORNE.

